Percolator.



c the said tube beingshown as broken oll'.

UNTE STATES are r rron.

CHARLES E. TREWHELLA, OF FORESTVILLE, CONNECTICUT, ASSIGNOR TO AMERICAN SILVER'COMPANY, OF BRISTOL, CONNECTICUT, A CORPO- RATION.

PERCOLATOR.

Specification of Letters Patent.

Patented Dec. 11, 1906.

to merit are simplicity and economy of construction with efficiency in operation, particularly with reference to the fountain mechanism.

In the accompanying drawings, Figure 1 is a central vertical section of the fountain I 5 mechanism and so much of a perculator as is necessary to show its connection therewith, the upper parts being broken away. Fig. 2 is a central vertical section of the sides of the valve-chamber, the top, bottom, valve-stem,

and valve being removed.

A designates the lower part of the percolator vessel, the upper part of which (not shown) may be of any ordinary construction. At the bottom of the vessel there is a central 2 5 depression 3 for a generating-chamber, which chamber is substantially closed at the top by the fountain-base 4, that is seated in the depression 3 in such manner as to leave a space tor a generating-chamber 5 between the said 0 case and that portion of the bottom of the ves- 'sel which comes within the depression 3. I prefer to form this fountain-base with dohble walls, so as to form an inclosed air-chamber 6 to serve as a heat-insulator between the gen- 3 5 crating-chamber and the body of the vessel,

all in in well-known manner not peculiar to the invention herein disclosed.

The fountain-base 1 is centrally perl'orated to receive the cylindrical valve-chamber 7.

This chamber is provided with a valve-seat S,

that forms the upper wall of the said chamber and which is provided with a port or ports E), preferably with three ports. of the valve-seat an ordinary percolator-tube or fountain-tube 10 is secured, the said tube being in communication with the generating chamber and extended upwardly in the usual manner to the percolatingchz1 mber for conducting the lion id thereto, the upper part oi l prefer to provide the valve-cliamber 7 with an inner cylinder 11, that extends from the bottom ot the valve-chamber upwardly to the vab-e-seat 8, leaving a space or passage In the center between the outer and inner cylinders ofthe valve-chamber. The upper end of the inner cylinder 11 is partially cut away to form.

mainly through the passage between the said two cylinders-that is, between'the inner cylinder 11 and the valve-chambenfl, that constitutes the outer cylinder-While the inner cylinder is substantially filled horizontally by a valve, so that but little liquid can pass through the inner cylinder; of the valvechamber. 'The bottom of the valve-chamber is perforated, as at 14, to make it open downwardly into the generating chamber and is provided with an upwardly-projecting tubular valve-stem or guide 15, that extends up to the valve-seat and forms the passage through which the fluid flows in its 11 ward movement from the generating-chem er to the fountain-tube 10. The floating valve is mounted to slide loosely on the stem or guide 15. It is composed of a valvebody 16 and,

outer and inner cylinders 17 and 18, respectively, depending from the said valve-body, so .--s to form an annular air-charnber underneath the said body. The valve-body is fit ted to the valve-seat 8 so as to close the ports 9 when raised. in its sliding up-and-down movements by the valve-stem and inner cylinder 18, while the outer cylinder 17 substantially fills the inner cylinder 1.1 of the valve-chamber, but is intended to till the same so looselythat it cans not bind therein. The inner cylinder 18 of the valve is a little longer than the outer cylinder 17, so that when the valve falls to its lowermost position, as shown in Fig. 1, the lower edge of the outer cylinder will not strike the bottom wall of the valvechamber. The valve maybe formed of any suitable material; but I prefer to make it 0t aluminium on account of the lightness of that material.

The percolator is charged in the ordinary way, the valve at first being down, as shown in Fig. 1. The liquid will flow from the body of the vessel down through the ports 9 in the valve-seat into the valve-chamber and down through said chamber into the generatingchamber. The air within the interior of the valve will be inclosed by the liquid when the valve is submerged, so that the air cannot escape, and thus the valve will float and rise up in the valvechamber and against the valve- The valve is mainly guided chamber sufficiently to let the valve iall and openv the parts 9 fresh liquid from above is again admitted, ready to repeat the operstion.

it is apparent that some changes from the speeifio construction herein. disclosed. may he made, and therefore I do not WiSl'l to he understood as limiting myself to the precise form of construction shown and described, but desire the liberty to make such change? in Working my invention as may fairly come within the spirit and scope of the same. l

By my improvement a simple. inexpensive, and compact arrangement of the fountain ineehanism is produced. The valve-chaml er and valve are centrally arranged and are foundto be very sensitive and efiicient in action.

I claim as my inventionj 1. In a pereolator the combination of a vessel having a generatingwhamher at its bottom with a fou11taintuhe in comnmnieai tion with the said chamber, a valve-chamber l opening downwardly into the said generating-chamber, a valve seat and port at the upper end of the said chamber, a valve stem or, guide centrally arranged within the said valveehamber, and a va ve mounted to rise and fall on the said valve-st em and having on its under side an annular airspace for lifting 5 the valve on the said stem when the valve is submerged in liquid.

2. In a peroolator, the comhinationof a vessel having; a gonerating-chamber at its bottom with a fountain-base forming the top of the said chamber, a valve-chan'lber centrally arranged in the said fountain-base, a valve seat and port at the upper end of the said valve-chamber, a tubular valve stem or guide centrally arranged Within the said valve-chamher, a fountain-tube mounted in the said valve-seat in communication with the interior of the said valve-stem, and a valve mounted to rise and fall on the said tubular valvestem and having'an annular air-chamber in its under side.

3. in a pereolator, the combination of a 3 vessel having a generating-chainber' at its bottom with a fountain-tube in communication with the said chan'lber, a valve-chamber opening into the said generating-chamber, a valve seat and port at the upper end of the valvewhamber, an inner cylinder inside of the said valve-chamber with a downward passage between the said inner cylinder and main wall of the valve-chamber, a valve stem or guide centmll arranged wit-hm the said valve-chamber, and a floating valve mounted on the valve-stem and within the inner cylinder of the said valve-chamber and havinga diameter that substantially fills the inner diameter of the said inner eylinder.

CHARLES E. TREWHELLA.

Witnesses i Jnxrus it. SMITH,

A. 1). WILSON. 

